There aren't that many chopper (helicopter) shooters to begin with, but if you're looking for one, this is considered one of the best ones out there. The successor to the huge hit, Twin Eagle II ups not only the graphics, but soundtrack, gameplay and most important for shooters, the intensity level. Absolutely addicting if you've ever played this game and a whole lot of fun.
2-Player Simultaneous action, with Vertical Scrolling. You will need a vertical configured monitor setup and at least 3 play buttons for this game.